• Rajashekhara, Sudhakar's avatar
    ARM: davinci: da850 EVM: read mac address from SPI flash · 810198bc
    Rajashekhara, Sudhakar authored
    DA850/OMAP-L138 EMAC driver uses random mac address instead of
    a fixed one because the mac address is not stuffed into EMAC
    platform data.
    
    This patch provides a function which reads the mac address
    stored in SPI flash (registered as MTD device) and populates the
    EMAC platform data. The function which reads the mac address is
    registered as a callback which gets called upon addition of MTD
    device.
    
    NOTE: In case the MAC address stored in SPI flash is erased, follow
    the instructions at [1] to restore it.
    
    [1] http://processors.wiki.ti.com/index.php/GSG:_OMAP-L138_DVEVM_Additional_Procedures#Restoring_MAC_address_on_SPI_Flash
    
    Modifications in v2:
    Guarded registering the mtd_notifier only when MTD is enabled.
    Earlier this was handled using mtd_has_partitions() call, but
    this has been removed in Linux v3.0.
    
    Modifications in v3:
    a. Guarded da850_evm_m25p80_notify_add() function and
       da850evm_spi_notifier structure with CONFIG_MTD macros.
    b. Renamed da850_evm_register_mtd_user() function to
       da850_evm_setup_mac_addr() and removed the struct mtd_notifier
       argument to this function.
    c. Passed the da850evm_spi_notifier structure to register_mtd_user()
       function.
    
    Modifications in v4:
    Moved the da850_evm_setup_mac_addr() function within the first
    CONFIG_MTD ifdef construct.
    Signed-off-by: default avatarRajashekhara, Sudhakar <sudhakar.raj@ti.com>
    Signed-off-by: default avatarSekhar Nori <nsekhar@ti.com>
    Cc: stable@kernel.org
    810198bc
board-da850-evm.c 31.4 KB